Kyushu University Academic Staff Educational and Research Activities Database
Researcher information (To researchers) Need Help? How to update
YONGSU YOON Last modified date:2020.08.05

Assistant Professor / Division of Medical Quantum Sciences
Department of Health Sciences
Faculty of Medical Sciences

Graduate School

E-Mail *Since the e-mail address is not displayed in Internet Explorer, please use another web browser:Google Chrome, safari.
 Reseacher Profiling Tool Kyushu University Pure
Academic Degree
Country of degree conferring institution (Overseas)
Field of Specialization
Digital Radiography, Medical Image Evaluation, Radiological Technology
ORCID(Open Researcher and Contributor ID)
Research Interests
  • Real-time radiographic simulator based on the general purpose motion sensor
    keyword : Radiological examination, Motion sensor, Parallel computing
  • Novel indirect flat panel detector system for removing scatter radiation

    keyword : Monte Carlo simulation, Indirect flat panel detector, Scatter radiation, Grid
Current and Past Project
  • Practical Skill Enhancement–Oriented and Team-Based Medical Care Acceleration Program-This project aims to train advanced medical personnel needed for medical practice and help achieve team-based medical care. A Practical Skill Enhancement-Oriented and Team-Based Medical Education Communication Committee will be established as part of the project to strengthen collaboration between the Department of Health Sciences, School of Medicine, Kyushu University, which is responsible for training medical technologists, and clinical professors at facilities in Kyushu University that accept undergraduate students.
Academic Activities
1. Hyemin Park, Yongsu Yoon*, Nobukazu Tanaka, Jungsu Kim, Jungmin Kim*, and Junji Morishita, Feasibility of displayed exposure index in IEC standard framework as a dose optimisation tool for digital radiography systems, Radiation Protection Dosimetry (2020),, 2020.05.
2. Yongsu Yoon, Junji Morishita, Min Seok Park, Hyunji Kim, Kihyun Kim, Jungmin Kim, Monte Carlo simulation-based feasibility study of novel indirect flat panel detector system for removing scatter radiation, Physica Medica, 10.1016/j.ejmp.2015.11.008, 32, 1, 182-187, 2016.01, The purpose of this study is to investigate the feasibility of a novel indirect flat panel detector (FPD) system for removing scatter radiation. The substrate layer of our FPD system has a Pb net-like structure that matches the ineffective area and blocks the scatter radiation such that only primary X-rays reach the effective area on a thin-film transistor. To evaluate the performance of the proposed system, we used Monte Carlo simulations to derive the scatter fraction and contrast. The scatter fraction of the proposed system is lower than that of a parallel grid system, and the contrast is superior to that of a system without a grid. If the structure of the proposed FPD system is optimized with respect to the specifications of a specific detector, the purpose of the examination, and the energy range used, the FPD can be useful in diagnostic radiology..
3. Yongsu Yoon, Hyunji Kim, Min Seok Park, Jungsu Kim, Deoknam Seo, Inseok Choi, Hoiwoun Jeong, Jungmin Kim, Monte Carlo simulation-based feasibility study of a dose-area product meter built into a collimator for diagnostic X-ray, Radiation Protection Dosimetry, 10.1093/rpd/nct339, 162, 3, 421-426, 2014.12, According to the International Electro-technical Commission, manufacturers of X-ray equipment should indicate the number of radiation doses to which a patient can be exposed. Dose-area product (DAP) meters are readily available devices that provide dose indices. Collimators are the most commonly employed radiation beam restrictors in X-ray equipment. DAP meters are attached to the lower surface of a collimator. A DAP meter consists of a chamber and electronics. This separation makes it difficult for operators to maintain the accuracy of a DAP meter. Developing a comprehensive system that has a DAP meter in place of a mirror in the collimator would be effective for measuring, recording the dose and maintaining the quality of the DAP meter. This study was conducted through experimental measurements and a simulation. A DAP meter built into a collimator was found to be feasible when its reading was multiplied by a correction factor..
1. Y. Yoon, YH. Roh, K. Kim, J. Kim, J. Morishita, Preliminary study of novel flat panel detector system to reduce scattered radiation in digital mammography, IEEE Nuclear Science Symposium and Medical Imaging Conference, 2019.11.
2. Yoon Y., Cho B., Eto M., Morishita, J., Real-time Skull Radiographic Simulator Based on Optical Tracking System for the Education and Training of Less-Experienced Radiology Personnel, 105th Scientific Assembly and Annual Meeting, Radiological Society of North America (RSNA 2019), 2019.12.
3. Yoon, Y., et al,, Real-time radiographic simulator based on a general purpose motion sensor for the education and training of less-experienced radiology personnel, 103rd Scientific Assembly and Annual Meeting, Radiological Society of North America (RSNA 2017), 2017.12.
4. Yoon, Y., et al,, Angular performance of novel indirect flat panel detector system for removing scatter radiation: Monte Carlo simulation study, 28th European Congress of Radiology (ECR 2016), 2016.02.
5. Yoon, Y., et al,, Simulation study for removing scatter radiation in cesium-iodine based flat panel detector system, American Association of Physicists in Medicine (AAPM) the 57th Annual Meeting, 2015.07.
Membership in Academic Society
  • Medical Imaging and Information Sciences
  • Japanese Society of Legal Medicine
  • Korean Society of Radiological Sciences
  • Japanese Society of Radiological Technology